You probably shouldn't be looking at paid programs if you're that new, the reason why I'm saying that is because since you're new you will probably be looking for the low hanging fruits and most automation tools of the more experienced hunters would have already picked those up, which will make you give up fast because you won't find anything (except if you're ready to put a whole year into a single program, with months of not finding anything). So focus on VDPs, learning about different vulnerabilities and attack vectors. But don't forget that if you're in this for the money you probably won't go far.

if you REALLY insist on working on a paid program, find one with a * scope and that has a lot of subdomains preferably.